Synthesis 2024; 56(01): 171-178
DOI: 10.1055/a-2175-1008
paper

Synthesis of Oxindoles via SmI2-Promoted Reduction of 2-Nitrophenylacetic Acids

Pengkai Wang
,
Songlin Zhang
We gratefully acknowledge the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, the Project of Scientific and Technologic Infrastructure of Suzhou (No. SZS201207), and the National Natural Science Foundation of China (No. 21072143) for financial support.


Abstract

The reduction of 2-nitrophenylacetic acids to oxindoles promoted by SmI2 is reported for the first time. This reaction involving the reduction of nitro group proceeds through N–O bond cleavage and direct condensation with the neighboring carboxyl group. From a synthetic point of view, a new method for the synthesis of oxindoles in mild neutral conditions is developed.

Supporting Information



Publication History

Received: 16 July 2023

Accepted after revision: 13 September 2023

Accepted Manuscript online:
13 September 2023

Article published online:
24 October 2023

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